drivers/scsi/hpsa.h

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
   4  *
   5  *    This program is free software; you can redistribute it and/or modify
   6  *    it under the terms of the GNU General Public License as published by
   7  *    the Free Software Foundation; version 2 of the License.
   8  *
   9  *    This program is distributed in the hope that it will be useful,
  10  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  12  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  13  *
  14  *    You should have received a copy of the GNU General Public License
  15  *    along with this program; if not, write to the Free Software
  16  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  *
  18  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  19  *
  20  */
  21 #ifndef HPSA_H
  22 #define HPSA_H
  23
  24 #include <scsi/scsicam.h>
  25
  26 #define IO_OK           0
  27 #define IO_ERROR        1
  28
  29 struct ctlr_info;
  30
  31 struct access_method {
  32         void (*submit_command)(struct ctlr_info *h,
  33                 struct CommandList *c);
  34         void (*set_intr_mask)(struct ctlr_info *h, unsigned long val);
  35         unsigned long (*fifo_full)(struct ctlr_info *h);
  36         bool (*intr_pending)(struct ctlr_info *h);
  37         unsigned long (*command_completed)(struct ctlr_info *h);
  38 };
  39
  40 struct hpsa_scsi_dev_t {
  41         int devtype;
  42         int bus, target, lun;           /* as presented to the OS */
  43         unsigned char scsi3addr[8];     /* as presented to the HW */
  44 #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
  45         unsigned char device_id[16];    /* from inquiry pg. 0x83 */
  46         unsigned char vendor[8];        /* bytes 8-15 of inquiry data */
  47         unsigned char model[16];        /* bytes 16-31 of inquiry data */
  48         unsigned char raid_level;       /* from inquiry page 0xC1 */
  49 };
  50
  51 struct ctlr_info {
  52         int     ctlr;
  53         char    devname[8];
  54         char    *product_name;
  55         struct pci_dev *pdev;
  56         u32     board_id;
  57         void __iomem *vaddr;
  58         unsigned long paddr;
  59         int     nr_cmds; /* Number of commands allowed on this controller */
  60         struct CfgTable __iomem *cfgtable;
  61         int     max_sg_entries;
  62         int     interrupts_enabled;
  63         int     major;
  64         int     max_commands;
  65         int     commands_outstanding;
  66         int     max_outstanding; /* Debug */
  67         int     usage_count;  /* number of opens all all minor devices */
  68 #       define PERF_MODE_INT    0
  69 #       define DOORBELL_INT     1
  70 #       define SIMPLE_MODE_INT  2
  71 #       define MEMQ_MODE_INT    3
  72         unsigned int intr[4];
  73         unsigned int msix_vector;
  74         unsigned int msi_vector;
  75         int intr_mode; /* either PERF_MODE_INT or SIMPLE_MODE_INT */
  76         struct access_method access;
  77
  78         /* queue and queue Info */
  79         struct list_head reqQ;
  80         struct list_head cmpQ;
  81         unsigned int Qdepth;
  82         unsigned int maxQsinceinit;
  83         unsigned int maxSG;
  84         spinlock_t lock;
  85         int maxsgentries;
  86         u8 max_cmd_sg_entries;
  87         int chainsize;
  88         struct SGDescriptor **cmd_sg_list;
  89
  90         /* pointers to command and error info pool */
  91         struct CommandList      *cmd_pool;
  92         dma_addr_t              cmd_pool_dhandle;
  93         struct ErrorInfo        *errinfo_pool;
  94         dma_addr_t              errinfo_pool_dhandle;
  95         unsigned long           *cmd_pool_bits;
  96         int                     nr_allocs;
  97         int                     nr_frees;
  98         int                     busy_initializing;
  99         int                     busy_scanning;
 100         int                     scan_finished;
 101         spinlock_t              scan_lock;
 102         wait_queue_head_t       scan_wait_queue;
 103
 104         struct Scsi_Host *scsi_host;
 105         spinlock_t devlock; /* to protect hba[ctlr]->dev[];  */
 106         int ndevices; /* number of used elements in .dev[] array. */
 107 #define HPSA_MAX_SCSI_DEVS_PER_HBA 256
 108         struct hpsa_scsi_dev_t *dev[HPSA_MAX_SCSI_DEVS_PER_HBA];
 109         /*
 110          * Performant mode tables.
 111          */
 112         u32 trans_support;
 113         u32 trans_offset;
 114         struct TransTable_struct *transtable;
 115         unsigned long transMethod;
 116
 117         /*
 118          * Performant mode completion buffer
 119          */
 120         u64 *reply_pool;
 121         dma_addr_t reply_pool_dhandle;
 122         u64 *reply_pool_head;
 123         size_t reply_pool_size;
 124         unsigned char reply_pool_wraparound;
 125         u32 *blockFetchTable;
 126         unsigned char *hba_inquiry_data;
 127 };
 128 #define HPSA_ABORT_MSG 0
 129 #define HPSA_DEVICE_RESET_MSG 1
 130 #define HPSA_RESET_TYPE_CONTROLLER 0x00
 131 #define HPSA_RESET_TYPE_BUS 0x01
 132 #define HPSA_RESET_TYPE_TARGET 0x03
 133 #define HPSA_RESET_TYPE_LUN 0x04
 134 #define HPSA_MSG_SEND_RETRY_LIMIT 10
 135 #define HPSA_MSG_SEND_RETRY_INTERVAL_MSECS (10000)
 136
 137 /* Maximum time in seconds driver will wait for command completions
 138  * when polling before giving up.
 139  */
 140 #define HPSA_MAX_POLL_TIME_SECS (20)
 141
 142 /* During SCSI error recovery, HPSA_TUR_RETRY_LIMIT defines
 143  * how many times to retry TEST UNIT READY on a device
 144  * while waiting for it to become ready before giving up.
 145  * HPSA_MAX_WAIT_INTERVAL_SECS is the max wait interval
 146  * between sending TURs while waiting for a device
 147  * to become ready.
 148  */
 149 #define HPSA_TUR_RETRY_LIMIT (20)
 150 #define HPSA_MAX_WAIT_INTERVAL_SECS (30)
 151
 152 /* HPSA_BOARD_READY_WAIT_SECS is how long to wait for a board
 153  * to become ready, in seconds, before giving up on it.
 154  * HPSA_BOARD_READY_POLL_INTERVAL_MSECS * is how long to wait
 155  * between polling the board to see if it is ready, in
 156  * milliseconds.  HPSA_BOARD_READY_POLL_INTERVAL and
 157  * HPSA_BOARD_READY_ITERATIONS are derived from those.
 158  */
 159 #define HPSA_BOARD_READY_WAIT_SECS (120)
 160 #define HPSA_BOARD_NOT_READY_WAIT_SECS (100)
 161 #define HPSA_BOARD_READY_POLL_INTERVAL_MSECS (100)
 162 #define HPSA_BOARD_READY_POLL_INTERVAL \
 163         ((HPSA_BOARD_READY_POLL_INTERVAL_MSECS * HZ) / 1000)
 164 #define HPSA_BOARD_READY_ITERATIONS \
 165         ((HPSA_BOARD_READY_WAIT_SECS * 1000) / \
 166                 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
 167 #define HPSA_BOARD_NOT_READY_ITERATIONS \
 168         ((HPSA_BOARD_NOT_READY_WAIT_SECS * 1000) / \
 169                 HPSA_BOARD_READY_POLL_INTERVAL_MSECS)
 170 #define HPSA_POST_RESET_PAUSE_MSECS (3000)
 171 #define HPSA_POST_RESET_NOOP_RETRIES (12)
 172
 173 /*  Defining the diffent access_menthods */
 174 /*
 175  * Memory mapped FIFO interface (SMART 53xx cards)
 176  */
 177 #define SA5_DOORBELL    0x20
 178 #define SA5_REQUEST_PORT_OFFSET 0x40
 179 #define SA5_REPLY_INTR_MASK_OFFSET      0x34
 180 #define SA5_REPLY_PORT_OFFSET           0x44
 181 #define SA5_INTR_STATUS         0x30
 182 #define SA5_SCRATCHPAD_OFFSET   0xB0
 183
 184 #define SA5_CTCFG_OFFSET        0xB4
 185 #define SA5_CTMEM_OFFSET        0xB8
 186
 187 #define SA5_INTR_OFF            0x08
 188 #define SA5B_INTR_OFF           0x04
 189 #define SA5_INTR_PENDING        0x08
 190 #define SA5B_INTR_PENDING       0x04
 191 #define FIFO_EMPTY              0xffffffff
 192 #define HPSA_FIRMWARE_READY     0xffff0000 /* value in scratchpad register */
 193
 194 #define HPSA_ERROR_BIT          0x02
 195
 196 /* Performant mode flags */
 197 #define SA5_PERF_INTR_PENDING   0x04
 198 #define SA5_PERF_INTR_OFF       0x05
 199 #define SA5_OUTDB_STATUS_PERF_BIT       0x01
 200 #define SA5_OUTDB_CLEAR_PERF_BIT        0x01
 201 #define SA5_OUTDB_CLEAR         0xA0
 202 #define SA5_OUTDB_CLEAR_PERF_BIT        0x01
 203 #define SA5_OUTDB_STATUS        0x9C
 204
 205
 206 #define HPSA_INTR_ON    1
 207 #define HPSA_INTR_OFF   0
 208 /*
 209         Send the command to the hardware
 210 */
 211 static void SA5_submit_command(struct ctlr_info *h,
 212         struct CommandList *c)
 213 {
 214         dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr,
 215                 c->Header.Tag.lower);
 216         writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
 217         (void) readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
 218         h->commands_outstanding++;
 219         if (h->commands_outstanding > h->max_outstanding)
 220                 h->max_outstanding = h->commands_outstanding;
 221 }
 222
 223 /*
 224  *  This card is the opposite of the other cards.
 225  *   0 turns interrupts on...
 226  *   0x08 turns them off...
 227  */
 228 static void SA5_intr_mask(struct ctlr_info *h, unsigned long val)
 229 {
 230         if (val) { /* Turn interrupts on */
 231                 h->interrupts_enabled = 1;
 232                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 233                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 234         } else { /* Turn them off */
 235                 h->interrupts_enabled = 0;
 236                 writel(SA5_INTR_OFF,
 237                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 238                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 239         }
 240 }
 241
 242 static void SA5_performant_intr_mask(struct ctlr_info *h, unsigned long val)
 243 {
 244         if (val) { /* turn on interrupts */
 245                 h->interrupts_enabled = 1;
 246                 writel(0, h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 247                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 248         } else {
 249                 h->interrupts_enabled = 0;
 250                 writel(SA5_PERF_INTR_OFF,
 251                         h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 252                 (void) readl(h->vaddr + SA5_REPLY_INTR_MASK_OFFSET);
 253         }
 254 }
 255
 256 static unsigned long SA5_performant_completed(struct ctlr_info *h)
 257 {
 258         unsigned long register_value = FIFO_EMPTY;
 259
 260         /* flush the controller write of the reply queue by reading
 261          * outbound doorbell status register.
 262          */
 263         register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
 264         /* msi auto clears the interrupt pending bit. */
 265         if (!(h->msi_vector || h->msix_vector)) {
 266                 writel(SA5_OUTDB_CLEAR_PERF_BIT, h->vaddr + SA5_OUTDB_CLEAR);
 267                 /* Do a read in order to flush the write to the controller
 268                  * (as per spec.)
 269                  */
 270                 register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
 271         }
 272
 273         if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
 274                 register_value = *(h->reply_pool_head);
 275                 (h->reply_pool_head)++;
 276                 h->commands_outstanding--;
 277         } else {
 278                 register_value = FIFO_EMPTY;
 279         }
 280         /* Check for wraparound */
 281         if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
 282                 h->reply_pool_head = h->reply_pool;
 283                 h->reply_pool_wraparound ^= 1;
 284         }
 285
 286         return register_value;
 287 }
 288
 289 /*
 290  *  Returns true if fifo is full.
 291  *
 292  */
 293 static unsigned long SA5_fifo_full(struct ctlr_info *h)
 294 {
 295         if (h->commands_outstanding >= h->max_commands)
 296                 return 1;
 297         else
 298                 return 0;
 299
 300 }
 301 /*
 302  *   returns value read from hardware.
 303  *     returns FIFO_EMPTY if there is nothing to read
 304  */
 305 static unsigned long SA5_completed(struct ctlr_info *h)
 306 {
 307         unsigned long register_value
 308                 = readl(h->vaddr + SA5_REPLY_PORT_OFFSET);
 309
 310         if (register_value != FIFO_EMPTY)
 311                 h->commands_outstanding--;
 312
 313 #ifdef HPSA_DEBUG
 314         if (register_value != FIFO_EMPTY)
 315                 dev_dbg(&h->pdev->dev, "Read %lx back from board\n",
 316                         register_value);
 317         else
 318                 dev_dbg(&h->pdev->dev, "hpsa: FIFO Empty read\n");
 319 #endif
 320
 321         return register_value;
 322 }
 323 /*
 324  *      Returns true if an interrupt is pending..
 325  */
 326 static bool SA5_intr_pending(struct ctlr_info *h)
 327 {
 328         unsigned long register_value  =
 329                 readl(h->vaddr + SA5_INTR_STATUS);
 330         dev_dbg(&h->pdev->dev, "intr_pending %lx\n", register_value);
 331         return register_value & SA5_INTR_PENDING;
 332 }
 333
 334 static bool SA5_performant_intr_pending(struct ctlr_info *h)
 335 {
 336         unsigned long register_value = readl(h->vaddr + SA5_INTR_STATUS);
 337
 338         if (!register_value)
 339                 return false;
 340
 341         if (h->msi_vector || h->msix_vector)
 342                 return true;
 343
 344         /* Read outbound doorbell to flush */
 345         register_value = readl(h->vaddr + SA5_OUTDB_STATUS);
 346         return register_value & SA5_OUTDB_STATUS_PERF_BIT;
 347 }
 348
 349 static struct access_method SA5_access = {
 350         SA5_submit_command,
 351         SA5_intr_mask,
 352         SA5_fifo_full,
 353         SA5_intr_pending,
 354         SA5_completed,
 355 };
 356
 357 static struct access_method SA5_performant_access = {
 358         SA5_submit_command,
 359         SA5_performant_intr_mask,
 360         SA5_fifo_full,
 361         SA5_performant_intr_pending,
 362         SA5_performant_completed,
 363 };
 364
 365 struct board_type {
 366         u32     board_id;
 367         char    *product_name;
 368         struct access_method *access;
 369 };
 370
 371 #endif /* HPSA_H */
 372